Apparatus for condensing fibrous materials preparatory to spinning.



B. BOHLE. APPARATUS FOR GONDENSING FIBROUS MATERIALS PREPARATORY TOSPINNING.

APBLIGATION FILED OUT. 17,1908.

996,557,, Patented Ju n'e zv, 1911.

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BRUNO BOHIJE, F WERDAU, GERMANY, ASSIGNOR TO THE FIRM 0F WERDAUERTEXTILWERKE G. M. B. H., OF LANGENHESSEN, NEAR WERDAU, GERMANY.

Specification of Letters Patent.

Application filed October 17, 1908.

Patented June 27, 1911. Serial No. 458,185.

To all whom it may concern:

Be it known that I, BRUNO BOHLE, manufacturer, a subject of the King ofSaxony,

and a resident of Werdau, Germany, have invented certain new and usefulImprovements in Apparatus for Condensing Fibrous Materials Preparatoryto Spinning, of which the following is a specification.

The present invention has for its object a roving machine especiallydesigned for treating tow waste and other difficult materials,comprising a film divider and condenser, and characterized by theprovision of special means for preventing the films from becoming woundaround the edges of the dividing bands or adhering to the same.

A further object is to provide an 1mproved intermediate conveyer devicefor obtaining the above result for removing the ribbon of film from thecutting bands with a speed corresponding to that of the material beingtreated and to so arrange and construct the conveyer that the operationwill not be impeded or the material damaged, and to protect the filmwith a special arrangement to accompany the dlvidlng bands until thestrip of film is delivered,

.which will positively prevent undue adhesion of the film to thedividing bands.

A further object is to soarrange the protecting bands that the film isformed very lightly and will always follow the dividing bands.

An embodiment of the invention is illustrated diagrammatically by way ofexample in the accompanyin drawing in which Figure 1 is a sideelevation, Fig. 2 is a front elevation of the dividing rollers to alarger scale, Figs. 3-5 are diagrams illustrating the difficultyencountered in removing the strips of film directly from the dividingbands to the rubbing belts. Fig. 3 is a diagrammatic plan view of therubbing belts, wherein the upper belt is running to the right, Fig. 4:is a diagrammatic perspective view of the strip of film in the midposition of the upper rubbing belt, Fig. 5 is a diagrammatic plan viewof the strip of film with the upper rubbing belt moving to the left,Fig. 6 is a partial section of a dividing roller showing the dividingbands and protecting bands as heretofore arranged. Fig. 7 is a partialsection through a dividing roller showing the arrangement of theprotecting bands and dividing bands in accordance with the presentinvention.

The dividing rollers of the film divider and condenser are marked a and7). Upon these dividing rollers the film 0 fed in a wide web is dividedin the known manner into separate strips f by means of the dividingbands (Z and e. In order to prevent the plucking of the band which isrunning back, that is, to prevent that the part of the dividing bandsrunning back idly will grasp the fibers projecting laterally from thepart of the dividing bands charged with film strips and running ahead,protecting bands 9' and h which are known are provided and accompany thedividing bands until the delivery of the strip of film f. This strip of:film is treated in the known manner upon the rubbing belts 2' and 70running at the same velocity as the dividing bands, the

thread being given a preliminary twist by the axial reciprocatingmovement of the rubbing belts.

In film dividers and condensers as heretofore constructed, the ribbon offilm 7 was removed from the dividing bands Z and 6 directly by therubbing belts 2' and is. The manner in which this removal was effectedis illustrated in Figs. 3 to 5. The strip of film f carried in thedirection represented by the line Z, and indicated by an arrow in Fig.3, by the dividing bands, continues to be fed as indicated by the lowerarrow in the same direction by the rubbing belts, and with a forcerepresented graphically by the line designated by the referencecharacter Z, but owing to the simultaneous axial displacement of therubbing belt the strip of film is pulled to the right in the directionindicated by the arrow m, and with a force represented by the samearrow; in order to simplify the representation and explanation, thetwisting of the strip, which complicates the process, has not been takeninto account.

The forces represented by the reference characters Z and m produce aresultant force a, which is greater than the consequent force Z, and thepull of the strip f by this increased force is so much greater inproportion as it approaches the left hand as clearly shown in Fig. 3.The lateral edge A B is therefore torn away from the dividing bands morequickly than the lateral edge C D and is correspondingly longer. Nowwhen the rubbing belts return to the middle position shown on Fig. 4:the extension of the fibers previously referred to results in 5 theformation of a loop which exerts a prejudicial effect upon theuniformity of the roving and is also drawn tight with a jerk during theopposite movement of the rubbing belts illustrated in Fig. and this mayobviously very easily cause the strip of film to break. If it beconsidered that the strip of film adheres very firmly to the dividingbands, especially in preparing tow waste and the like, it is obviousthat this irregular, jerky removal of the strip must necessarilyfrequently impair and break it and that this result might be avoided ifit were possible to remove the strip from the dividing bands with auniform force corresponding to that of such bands. This result isattained owing to the fact that the strip of film f is removed from thedividing bands not directly by the rubbing belts i and 70 but by meansof two intermediate conveyer devices such as the pairs of rollers andendless bands 7? and g immovable axially and moving with approximatelythe same velocity as the dividing bands; this conveyer device thendelivers the strip to the rubbing belts. By this means the frequentrupture of the strip of film is obviated with certainty. Owing to thefact that, as shown on the drawing by the arrows, the intermediateconveyer bands pass over the work bands during a portion of their pat-hwith an opposite movement to that of these bands, they clean them fromany adhering fibers and exert a smoothing effect preventing theretention of the strip of film. The strips of film do not adhere to thebelts p and g, because the said strips are in contact with the bands atbut a few points and for only a short time.

In the treatment of tow waste it has also been found that in the filmdividing and condensing machines heretofore generally employed the stripof film frequently followed the protecting bands instead of followingthe dividing bands which should deliver them to the rubbing belts. Thereason for this is shown in Fig. 6. In this figure the dividing roller 6in accordance with the usual practice presents a smooth surface uponwhich the protecting band 9 rests in the first place, then the strip offilm f and finally the dividing band cl. Owing to the tautness of theband the strip of film f is pressed with equal force against theprotecting band 9 and the dividing band cl so that it 6 is quite an openquestion which of the bands it will follow when they separate.

Now examining Fig. 7 it will be seen that the dividing roller Z)presents an annular groove r in which the protecting band 9 lies. Uponthe protecting band and the flanges s and 2f limiting it laterally theribbon of film f and the dividing band (Z rest. Now however taut theband (Z may be the only result of this tension is that the strip of filmf adheres more tightly to the band d while the band 5 7 O is preventedfrom pressing strongly against the strip 7' by bedding in the groove 1'.The band 9 therefore bears upon the strip of film with only so light apressure as is necessary to prevent plucking and the strip of film 7 5must follow the dividing band from the place where this band and theprotecting band separate. The rubbing belts 'i, k are not in contactwith the belts p and g. It is essential that the belts p and 9 contactwith the belts (Z and 9, but not that they contact with the belts i and72.

What I claim and desire to secure by Lettei's Patent of the UnitedStates is:

1. Apparatus for condensing fibrous nia- 35 terials such as tow wastesand the like preparatory for spinning, comprising a combination ofendless dividing straps, rollers for guiding the straps, axiallyreciprocating rubbing belts to which the fleece slivers are delivered,an intermediate conveyer device consisting of members moving at thepoint where they are nearest each other in the same direction as thefleece slivers and pressing tightly or jamming the latter betweenthemselves at a point between the dividing straps and rubbing belts,said guiding, members being immovable axially.

2. Apparatus for condensing fibrous materials such as tow wastes and thelike preparatory for spinning, comprising a combination of endlessdividing straps, rollers for guiding the straps, axially reciprocatingrubbing belts to which the fleece slivers are delivered, an intermediateconveyer device consisting of endless belts driven at the point wherethey are nearest each other in the same direction as the fleece sliversand guiding the latter between themselves at a point between thedividing straps and rubbing belts, said guiding belts having no axialmovement and being out of contact with the rubbing belts where the saidguiding belts are guiding the fleece slivers.

3. Apparatus for condensing fibrous ma- 115 terials such as tow wastesand the like preparatory for spinning, comprising a combination ofendless rubbing belts and dividing straps guided by suitable rollers anddelivering the fleece slivers to the rubbing belts re-- i ciprocatedaxially, covering belts accompanying the dividin belts and guided ingrooves in the guide rollers, said covering belts being narrower thanthe dividing belts and running in grooves on the dividing rollersunderneath the dividing belts.

4:. An apparatus of the class described, comprising endless dividingstraps, rollers for guiding the straps, covering belts accompanying thedividing belts, axially reciprocated rubbing belts, grooved rollers uponwhich the covering belts run, said covering belts being narrower thanthe dividing belts for the purpose set forth.

5. An apparatus of the class described, comprising endless dividingstraps, axially reciprocated rubbing belts and intermediate conveyerbelts between the dividing straps and the rubbing belts, the portions ofthe said conveyer belts adjacent to the dividing strapsmoving parallelWith the direction of motion thereof, and the portions of the saidconveyer belts adjacent to the rubbing belts running in the samedirection as the rubbing belts for the purpose set forth.

In Witness whereof I have hereunto set my hand in the presence of twoWitnesses.

BRUNO BOHLE.

Witnesses:

WILHELM KoNJETzNY, FREDERICK J. DIETZMAN.

Copies of this patent may be obtained for five cents. each, byaddressing the Commissioner of Patents, Washington, D. G.

